<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert title="添加商品" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 标签页 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                :options="catelist"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1" prop="manyTableData">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :headers="headersObj"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
						<quill-editor v-model="addForm.goods_introduce"></quill-editor>
						<el-button type="primary" @click="addGoods">添加商品</el-button>
					</el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import { getCate_api, getParams_api ,addGoods_api} from '@/api'
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
				pics: [],
				goods_introduce:'',
				attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 图片上传地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 设置上传的请求头部  图片上传
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
			},
			previewVisible: false,
			previewPath:''
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获取分类列表
    async getCateList() {
      const { data: res } = await getCate_api()
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类失败')
      this.catelist = res.data
      // console.log(this.catelist)
    },

    //   级联选择器值发生变化触发函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },

    // 切换标签之前的钩子，若返回 false 或者返回 Promise 且被 reject，则阻止切换
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      } else if (this.addForm.goods_name === '') {
        this.$message.error('请输入商品名称')
        return false
      }
    },

    // tab页切换触发
    async tabClicked() {
      if (this.activeIndex === '1') {
        // 动态参数
        const { data: res } = await getParams_api(this.cateId, { sel: 'many' })
        if (res.meta.status !== 200)
          return this.$message.error('获取商品分类失败')
        // attr_vals 拆分成数组
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        // 静态属性
        const { data: res } = await getParams_api(this.cateId, { sel: 'only' })
        if (res.meta.status !== 200)
          return this.$message.error('获取商品分类失败')
        this.onlyTableData = res.data
      }
    },

    // 图片删除时触发的函数
    handleRemove(file) {
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(item => item.pic === filePath)
      // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm.pics)
    },

    // 图片预览函数
    handlePreview(file) {
			// console.log(file)
			this.previewVisible = true
			this.previewPath = file.response.data.url
    },

    // 图片上传成功触发的函数
    handleSuccess(response) {
      // console.log(response)
      // 上传成功得到一个临时路径对象
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
		},

		// 添加商品
		addGoods(){
			this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
				}
				// 拼接原goods_cat的数组会导致级联选择器双向绑定的值发生变化，类型不同，会报错
				// this.addForm.goods_cat = this.addForm.goods_cat.join(',')
				// 深拷贝 goods_cat以','分割的分类列表
				const form = _.cloneDeep(this.addForm)
				form.goods_cat = form.goods_cat.join(',')

				// 商品的参数（数组），包含 动态参数 和 静态属性
				// 处理动态参数
				this.manyTableData.forEach(item => {
					const newInfo = {
						attr_id:item.attr_id,
						attr_value:item.attr_vals.join(' ')
					}
					this.addForm.attrs.push(newInfo)
				});
				// 处理静态属性
				this.onlyTableData.forEach(item => {
					const newInfo = {
						attr_id:item.attr_id,
						attr_value:item.attr_vals
					}
					this.addForm.attrs.push(newInfo)
				});
				// 添加到form中
				form.attrs = this.addForm.attrs
				// console.log(form)

				// 发送请求添加商品
				const {data:res} = await addGoods_api(form)
				if(res.meta.status !== 201) return this.$message.error('添加商品失败')
				this.$message.success('添加商品成功')
				// console.log(res.data)
				this.$router.push('/goods')
				})

		}
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      } else {
        return null
      }
    }
	},
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
	width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
